I am new to Buddhism and I am trying to understand the 2nd Noble truth . The first Noble truth asks us to understand and experience Suffering. Once the First Noble truth has been understood the Buddha tells us the 2nd Noble truth

Translation by Bikkkhu Bodhi:

“Now this, bhikkhus, is the noble truth of the origin of suffering: it is this craving which leads to re-becoming, accompanied by delight and lust, seeking delight here and there; that is, craving for sensual pleasures, craving for becoming, craving for disbecoming.

My understanding of the Buddha's message of the 2nd Noble Truth is this:-

Rebirth happens due to Craving. The Cause of Craving is ignorance of the 4 Noble Truths but more importantly ignorance of Anatta (Non-Self) , Anicca (Impermanence) and Non-understanding of the Law of Dependent Origination.

There are 3 types of Craving :- Kama Tanha :- Craving for Sense pleasures - meaning craving for pleasurable things cognizable by the eye,ear,touch,Tongue,smell and mental image which also includes sexual craving.